<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        $(document).ready(function() {
            $('$user').blur(function() {
                $.get('./jquery.html', {
                    user: $('#user').val(),
                    pwd: $('pwd').val()
                }, function(data, statu) {
                    // console.log(data, statu);
                    $('#pwd').html(data);
                });

            })
        })
    </script>
</body>

</html>